April 17, 1915 
LAND AND WATER 
are the only Standard 
10/6 Fountain Pens 
All British Made by a 
British Company with 
British Capital and 
Labour. 
THOMAS DE LA RUE & CO.. LTD. 
If, knowing all you know, 
you still can support German 
productions, we do not ask you 
to leave off drinking Apol- 
linaris, BUT if you desire to try 
what your own country can 
produce, we ask you to write 
to us for a FREE sample of 
SIRIS 
a pure British Table Water 
possessing the same valuable 
antacid properties as ApoUin- 
aris and similar to it in taste. 
Repd. Quarts. 
Per Doz. Qj- 
Repd. Pint*. 
3/6 
Carriage Paid. 
Repd. A Pints. 
2/6 P=' Doz. 
Sample "Bottle FREE on receipt of Coupon ~»i 
Name 
Address- 
Usual Purveyor of 
Mirural Waters 
A. J. CALEY & SON, Ltd., 
Chenies Street Works, LONDON; Chapel Field Works, NORWICH. 
Periscope extended to 2 feet, 
ready for use. 
Closed to 4J Inch square by 2 inch thick. 
A Perfect Periscope at last ! 
approved by the War Office. 
"Lifeguard" 
Patent Collapsible 
Pocket Periscope 
is a scientifically constructed in-, 
strument fulfilling every possible 
requirement and entirely super- 
seding the cumbersome make- 
shifts hitherto offered. 
Light, Strong, Contipact, 
Invisible, and Efficient 
It weighs only 22ozs., measures 4Jin. 
square by 2111. thick, and INSTANTLY 
extends with a single movement to 2ft., 
ready for use, without the slightest adjust- 
ment of any kind, raising the line of 
sight any desired elevation from 6 to 20in., 
giving clear cover from rifle fire up to 15in. 
Horizontal field 25 yards at 100 yards.j 
Perfectly Rigid 
in any position 
Exceedingly durable — the frame is made 
of tough steel, practically unbreakable, 
heavily coppered and dull nickel plated 
to render it rustproof The mirrors are 
best British THIN PLATE glass (replace- 
able) 4| by 3|in., giving perfect reflection; 
the silvering protected by watertight 
Aluminium cases finished dull black. 
Order now for yourself, 
or your friend at the front 
12/6 
POST FItn 
mirror 
15/- 
POSTTKBB 
Packed in Khaki case for 
attaching to belt. 
Price, complete with spare 
and polishing cloth, in cloth- 
covered leather-board box 
Price, complete with spare 
and polishing cloth in strong 
khaki collapsible waterproof 
case for belt, packed in box 
Postage and picking free in the United 
Kingdom. Extra spare mirrors 6d. each. 
Postage and packing 6d. extra to France, 
Belgiimi, Egypt, New Zealand, and Canada. 
Purchase frice refunded without question 
if not approved on receipt. 
Sole MANUFACTUftBKS & Patentees: 
F.DUERR&SONS 
MANCHESTER, S.W. 
Also from Opticians, Military Outfitters, 
Stores. &c. For Trade Discount apply 
on Trade Heading. _ 
39 
